Hi, in that space I would put a nice relaxing framed print and beneath it a shaker style shelf with pegs to hang pretty scarves or hats or bags. I have one in my utility room between two cupboards and it gives a lovely feel to the room as well as being useful. Mirrors are not good feng shui opposite a bed and although shoe storage is great it might be too much between the wardrobes. Pretty colours!

I would recommend white painted walls. Add accessories that are colorful if you wish. You can change it anytime you want. Depending on the space, I would definitely add something like raw thick tree branch. You can then make some fairy doors on it in color. Interaction with a child making these doors :) I would also choose funky prints of animals over the decals. Or have some animal heads hung on the walls. Children loves cozy spaces canopy is the thin. I would recommend Numero 74. I love their range of colors and quality. Add some cool pillows. If you are into diy, make some. Paint on it, embroider, use different techniques to apply color and texture to the room. Have more than one lighting source: fairylights, floor lamp, etc. If you want something really cool: cover ceiling in polka dots. Don't paint it. You can cut out some cardpaper circles and stick it with blutack. Use different sizes one color rather than having different colors. Take it off when tired of it easily. Enjoy decorating the room :) V

Have you looked at the Romo Fabric collection 'Linara' it's available in a huge pallette of colours and they co-ordinate really well with Farrow and Ball paints

What age is the house? If it’s 60+years old I’d say you can go with any style. 60’s onwards (unless it’s mock old) go contemporary. I always think modern houses look daft/uncomfortable when people go vintage/Cottage/shabby. I like these styles but needs to work with the house.